media.c

用at91sam7s64+ucos写的mp3播放程序

//media.c
#define  MEDIA_GLOBAL

#include "type.h"
#include "sd.h"

#include "media.h"
#include "global.h"
#include "ide.h"


//-------------------------------------------------------------
//media initialize
//-------------------------------------------------------------
INT8U media_Init(void)
{
   u8MediaLock = 1;
   
   if(sd_Init() == OK)
   {
     return OK;
   }
   else
   {
      return KO;
   }
}


//----------------------------------------------------------------------
//get the open postion
//----------------------------------------------------------------------
void media_ReadOpen(INT32U u32Sector)
{
   u32OpenSector = u32Sector;
   u8MediaLock = 0;
}


//-------------------------------------------------------------
//read one sector,then u32OpenSector++
//-------------------------------------------------------------
void media_ReadSector(void)
{
   if(0 == u8MediaLock)
   {
     // Udisk_ReadSector(u32OpenSector, gl_buffer);
     // sd_ReadSector(u32OpenSector, gl_buffer);
  
      ide_ReadSector(u32OpenSector, gl_buffer);
      u32OpenSector ++;
   }  
}


//-------------------------------------------------------------
//write one sector,then u32OpenSector++
//-------------------------------------------------------------
void media_WriteSector(void)
{
   if(0 == u8MediaLock)
   {
      ide_WriteSector(u32OpenSector, gl_buffer);
      u32OpenSector ++;
   }
}

//-------------------------------------------------------------
//read close
//-------------------------------------------------------------
void media_ReadClose(void)
{
   u32OpenSector = 0;
   u8MediaLock = 1;
}